messages.downloadAttachmentBlobAndUrl()

Retrieve an attachment's blob and URL using messageId and attachmentId, which is useful for image attachments.

To tell if an attachment is an image, use:

const message = ...
const attachment = message.attachments[0]
const isImage = attachment.contentType.indexOf('image/') === 0

Definition

client.messages.downloadAttachmentBlobAndUrl(
  messageId: string|Message,
  attachmentId: string|number
):Promise<string,Error>

Parameters

Response

An error will be thrown if any of the arguments are invalid.

Otherwise, once the returned Promise is resolved, you will have access to the attachment URL as a string

Example

const file = await client.messages.downloadAttachmentBlobAndUrl(
  message.id,
  message.attachments[0].id
);
console.log('attachment blob is', file.blob);
console.log('attachment URL is', file.url);

In your HTML (After making sure the URL is of an image attachment):

<img src="URL goes here" alt="attachment-image" />